25605725 has 12 divisors (see below), whose sum is σ = 32227104. Its totient is φ = 20177520.

The previous prime is 25605719. The next prime is 25605733. The reversal of 25605725 is 52750652.

It is not a de Polignac number, because 25605725 - 2⁴ = 25605709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25605691 and 25605700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5969 + ... + 9318.

It is an arithmetic number, because the mean of its divisors is an integer number (2685592).

Almost surely, 2^25605725 is an apocalyptic number.

25605725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25605725 is a deficient number, since it is larger than the sum of its proper divisors (6621379).

25605725 is a wasteful number, since it uses less digits than its factorization.

25605725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15364 (or 15359 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 25605725 is about 5060.2099758804. The cubic root of 25605725 is about 294.7444881290.

The spelling of 25605725 in words is "twenty-five million, six hundred five thousand, seven hundred twenty-five".